<template>
  <div class="login-container" v-loading="loading">
    <el-form
      ref="loginFromRef"
      class="login-form"
      :rules="loginRules"
      :model="loginForm"
    >
      <div class="title-container">
        <h3 class="title">{{ $t('msg.login.title') }}</h3>
        <lang-select class="lang-select" effect="light"></lang-select>
      </div>
      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon="user"></svg-icon>
        </span>
        <el-input
          placeholder="username"
          name="username"
          type="text"
          v-model="loginForm.username"
        />
      </el-form-item>

      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon="password"></svg-icon>
        </span>
        <el-input
          placeholder="password"
          :type="pswType ? 'text' : 'password'"
          name="password"
          v-model="loginForm.password"
        />
        <span class="show-pwd">
          <svg-icon
            :icon="pswType ? 'eye-open' : 'eye'"
            @click="changePswType"
          />
        </span>
      </el-form-item>

      <el-button
        type="primary"
        style="width: 100%; margin-bottom: 30px"
        :loading="loading"
        @click="handleLogin"
        >{{ $t('msg.login.loginBtn') }}</el-button
      >
      <div class="tips" v-html="$t('msg.login.desc')"></div>
    </el-form>
  </div>
</template>

<script setup>
import LangSelect from '@/components/LangSelect/index.vue'
import { useI18n } from 'vue-i18n'
import { validatePassword } from './rules'
// 导入组件之后无需注册可直接使用
import SvgIcon from '@/components/SvgIcon/index.vue'
import { ref } from 'vue'
import { useStore } from 'vuex'
import { watchSwitchLang } from '@/utils/i18n'
// 监听语言变化，重新进行表单校验。issue: https://coding.imooc.com/learn/questiondetail/254087.html

const loginForm = ref({
  username: 'super-admin',
  password: '123456'
})
const i18n = useI18n()
const loginFromRef = ref(null)
// 验证规则
const loginRules = ref({
  username: [
    {
      required: true,
      trigger: ['blur', 'change'],
      message: i18n.t('msg.login.usernameRule')
    }
  ],
  password: [
    {
      required: true,
      trigger: ['blur', 'change'],
      validator: validatePassword()
    }
  ]
})
const pswType = ref(false)
const changePswType = () => {
  pswType.value = !pswType.value
}
const loading = ref(false)
const store = useStore()
const handleLogin = () => {
  loginFromRef.value.validate((valid) => {
    if (!valid) {
      return false
    }
    loading.value = true
    store
      .dispatch('user/login', loginForm.value)
      .then((res) => {
        loading.value = false
      })
      .catch((err) => {
        console.log(err)
        loading.value = false
      })
  })
}
watchSwitchLang(() => {
  loginFromRef.value.validate()
})
</script>

<style lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;
$cursor: #fff;

.login-container {
  min-height: 100%;
  width: 100%;
  background-color: $bg;
  overflow: hidden;

  .login-form {
    position: absolute;
    width: 520px;
    max-width: 100%;
    padding: 0 35px 0;
    margin: 0 auto;
    overflow: hidden;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    :deep(.el-form-item) {
      border: 1px solid rgba(255, 255, 255, 0.1);
      background: rgba(0, 0, 0, 0.1);
      border-radius: 5px;
      color: #454545;
    }

    :deep(.el-input) {
      display: inline-block;
      height: 47px;
      width: 85%;
      .el-input__wrapper {
        background: transparent;
        width: 100%;
        border: none;
        box-shadow: none;
      }
      input {
        background: transparent;
        border: 0px;
        -webkit-appearance: none;
        border-radius: 0px;
        padding: 12px 5px 12px 15px;
        color: $light_gray;
        height: 47px;
        caret-color: $cursor;
      }
    }
  }
  .tips {
    font-size: 16px;
    line-height: 28px;
    color: #fff;
    margin-bottom: 10px;

    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }

  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    display: inline-block;
  }

  .title-container {
    position: relative;

    .title {
      font-size: 26px;
      color: $light_gray;
      margin: 0px auto 40px auto;
      text-align: center;
      font-weight: bold;
    }
     :deep(.lang-select) {
      position: absolute;
      top: 4px;
      right: 0;
      background-color: white;
      font-size: 22px;
      padding: 4px;
      border-radius: 4px;
      cursor: pointer;
    }
  }

  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
